SAE (I had to look that one up) sets standards for the automotive, commercial vehicle and aerospace industries. Outside of those areas, how are their standards applicable? If I want to build a house (or design a model rocket), will I be required to use the same standard measurements that motor oil and auto parts use? A board or a piece of drywall or a body tube may come in a certain standard length, but I can cut it to any length that I want, right? From what I can tell, "SAE measurements" means "non-metric." Is there a table of standard fractions that is used across all disciplines?I have to disagree with that - there are industry standards. American industry recognizes SAE fractions, and often decimal inches and Metric, but the scale you gave it not typically used.
BTW, one of the earliest proponents of the metric system, who advocated for it for many years prior to its formal creation, was an American, Benjamin Franklin. Metrification is as American as baseball, apple pie, the Liberty Bell and Super Bowl Sunday.
MarkII
SAE (I had to look that one up) sets standards for the automotive, commercial vehicle and aerospace industries. Outside of those areas, how are their standards applicable? If I want to build a house (or design a model rocket), will I be required to use the same standard measurements that motor oil and auto parts use? A board or a piece of drywall or a body tube may come in a certain standard length, but I can cut it to any length that I want, right? From what I can tell, "SAE measurements" means "non-metric." Is there a table of standard fractions that is used across all disciplines?
What are the inside diameters of either BT-60 or BT-70, stated in fractions?
I can understand the need for standardization for such things as nuts and bolts (and the tools that drive them), but if I submit a blueprint that includes an interior wall length of say, 8 feet, 2-2/3 inches, what is the problem?
MarkII
So no American customs and cultures are truly native-grown, then. They all are all derived from Old World antecedents, right?Rounders is a game played between two teams each alternating between batting and fielding. The game originates in England and has been played there since Tudor times, with the earliest reference being in 1745 in A Little Pretty Pocket-Book where it is called "baseball".
The Liberty Bell was cast by the Whitechapel Bell Foundry in London.
English apple pie recipes go back to the time of Chaucer. And this recipe even includes figs.
Those are fractions that are based on powers of 8. This is customary here, but it isn't the only way to skin a cat.Well there is this one , base on SAE standards
https://www.seoconsultants.com/charts/inches-decimal/print.asp
But he could obtain such a rule if he wanted to, and if it was absolutely required by the job. They are available.The problem is no carpenter or drywall installer carries a tape measure with 1/3" on it! They carry a standard american measure,which is based on SAE fractions, probably graduated in 1/32". So your 2/3" would be translated as 21/32" which is within a tolerance of 1/32"
But he could obtain such a rule if he wanted to, and if it was absolutely required by the job. They are available.
Now what if I said that I needed boards that were eight and two-thirds feet long?
MarkII
Hence the problem of converting fractions of an inch (powers of 8), fractions of a foot (powers of 12) and fractions of a yard (powers of 3). You would be 16 inches off. Eight and two-thirds feet is 104 inches, not 120 inches.See the edit to my previous post - unless it's a million dollar order they will use what they have - if they have to buy a new measure just for you they will charge you for it.(I'm serious on that one)
ABSOLUTELY NOT! You will take 120" 'cuz that's what my tape measure says and you will be happy with it!
Hence the problem of converting fractions of an inch (powers of 8), fractions of a foot (powers of 12) and fractions of a yard (powers of 3). You would be 16 inches off. Eight and two-thirds feet is 104 inches, not 120 inches.
But converting millimeters to centimeters, centimeters to meters and meters to kilometers is so much harder.
MarkII
If I specified in my blueprints that I would need roof beams that were 127mm x 127mm by 762cm long, do you think my contractor in Ypsilanti would have a problem with that?
MarkII
I'm not in Ypsilanti; I just used that as an example of an American city. But according to Wikipedia, the Ypsilanti Water Tower is 147 feet tall and 85 feet in diameter at its base. The tower is listed in the National Register of Historic Places. I lived in Michigan until I was 16 (and my sister attended EMU), but I cannot recall ever seeing the tower.OOC, what are the measurements of your famous water tower?
LS: After reading your last post, I really wish I knew more about farm machinery and technology. But for the hydraulic lines, there isn't a hose in an SAE size that is equivalent or even close to the size of the original that could be adapted or made to work?
Don't laugh, but more than once I have had a metric crescent wrench fit over a nut better than the wrench in the fractional size that the nut is supposed to be. But the reverse never seems to occur (fractional-sized wrenches fitting metric nuts). Now, more often than not, when I have a nut to loosen or a bolt to turn I reach for my metric wrenches first.
MarkII
LS - I wonder if these people might be able to help you:
https://mdmetric.com/
Also, have you looked into getting the parts from a Canadian supplier?
MarkII
Nah, I don't pay any attention to that. It's not important to me.That does explain alot Mark. I thought you were typing just to up your thread count:roll:
Dunno. What's Pi in "English"?
(No Idea why people call it English any more - we've been using metric since the 70's-80's, except for pints of beer and miles for road distance)
A touch of irrationality can be a good thing...Sorry to beat this to death, but it has just occurred to me that there actually *is* a value of Pi in the Imperial System.
It works out to
Pi = .004759989... furlongs per foot
-LarryC
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